The mansion is decked out in seasonal regalia and filled with the sounds of the St. Katherine of Siena Choir during Glen Foerd on the Delaware's Holiday Open House. Free. 5001 Grant Ave., Philadelphia. 4 to 6 p.m.
Ring in the New Year in Newtown during its First Night celebration. Newtown Middle School and Council Rock High School North host a bevy of events highlighted by a festive parade and fireworks. $15; $10, children; free, younger than 4. 3 to 10 p.m. Locations vary; visit
Up in the sky
Join the Bucks-Mont Astronomical Society as it celebrates a belated winter solstice. Enjoy food and drink and sky observation, weather permitting. Call ahead to confirm. Free. Peace Valley Nature Center building, 170 Chapman Rd., Doylestown. 8 p.m.
Live up to your New Year's resolution to get in shape and check out what the Central Bucks Family YMCA has to offer. The open house features a recreational swim, crafts, fitness classes, demonstrations and refreshments. Free. 2500 Lower State Rd., Doylestown. Noon to 3 p.m.